I brought my car wearing the doughnut into the local tire place to get one of the stock tires fixed after being impaled by some nails. Since they were not able to repair the tire, I needed to get a new one. But since I have nearly 30k miles on all my tires, I figured I might as well do all four. But this had to be done with tires in stock as I need my car that day (keep in mind, it has the doughnut on it). So I went with the best they had in stock ... Dunlop SP901's. I really like these tires. They seemed to ride softer and quieter than stock Gators, and definitely grippier. Originally I was concerned that I did something stupid being pushed by the heat of the moment, but overall I am happy with the outcome. I believe these Dunlops are the stock rubber for Lexus IS300's ... for whatever that may be worth ...
Just my $0.02... nothing more than that ...